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Finding the Fourth Proportional to 392,941.80, 542,252.34 and 218,522.70

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Solution

The fourth proportional to 392,941.80, 542,252.34 and 218,522.70 is: 301,557.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,941.80 : 542,252.34 = 218,522.70 : x
  2. Step 2: Convert to fraction form
    392,941.80/542,252.34 = 218,522.70/x
  3. Step 3: Cross multiply
    392,941.80x = 542,252.34 × 218,522.70
  4. Step 4: Simplify right side
    392,941.80x = 118,494,445,418.12
  5. Step 5: Solve for x
    x = 118,494,445,418.12/392,941.80
  6. Step 6: Final answer
    x = 301,557.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.